This is way over complicating bike riding!! I wouldn’t use 80% of these features and I have di2. Why in the hell do I need to see what gear I am in on a computer? I have an Edge 500. I’ve had it for like 4 years without any issue. The key screen on that computer shows the following:
3s Power
Lap Power
Lap Time
HR
Cadence
Distance
That’s all I need to do all sorts of effective power based workouts on my bike (inside or out)! The rest is all fluff and isn’t going to get you stronger. Besides, who needs this giant thing sitting on their handlebars. Come on!!